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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 525 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.25 + 84 + 50 + 50 =
  2. 2.70 + 27 + 82 + 63 =
  3. 3.12 + 32 + 65 + 56 =
  4. 4.84 + 47 + 22 + 17 =
  5. 5.51 + 44 + 40 + 43 =
  6. 6.72 + 69 + 38 + 21 =
  7. 7.63 + 22 + 41 + 12 =
  8. 8.29 + 41 + 18 + 15 =
  9. 9.77 + 56 + 22 + 39 =
  10. 10.55 + 27 + 74 + 18 =
  11. 11.60 + 42 + 26 + 28 =
  12. 12.18 + 56 + 25 + 11 =
  13. 13.51 + 88 + 52 + 14 =
  14. 14.36 + 65 + 61 + 68 =
  15. 15.82 + 21 + 54 + 72 =
  16. 16.33 + 82 + 67 + 46 =
  17. 17.77 + 58 + 15 + 66 =
  18. 18.46 + 13 + 22 + 37 =
  19. 19.36 + 41 + 62 + 25 =
  20. 20.11 + 46 + 26 + 64 =
  21. 21.57 + 37 + 22 + 50 =
  22. 22.20 + 40 + 26 + 30 =
  23. 23.85 + 32 + 47 + 18 =
  24. 24.64 + 24 + 46 + 11 =
  25. 25.22 + 31 + 73 + 38 =
  26. 26.37 + 62 + 84 + 88 =
  27. 27.57 + 15 + 73 + 57 =
  28. 28.40 + 27 + 66 + 29 =
  29. 29.70 + 18 + 88 + 11 =
  30. 30.52 + 39 + 48 + 30 =
  31. 31.18 + 28 + 44 + 51 =
  32. 32.49 + 17 + 49 + 50 =
  33. 33.31 + 78 + 13 + 78 =
  34. 34.36 + 77 + 84 + 62 =
  35. 35.36 + 85 + 80 + 29 =
  36. 36.16 + 77 + 46 + 78 =
  37. 37.50 + 27 + 17 + 77 =
  38. 38.79 + 54 + 85 + 50 =
  39. 39.16 + 88 + 15 + 34 =
  40. 40.32 + 35 + 84 + 24 =

Answer key

  1. 209
  2. 242
  3. 165
  4. 170
  5. 178
  6. 200
  7. 138
  8. 103
  9. 194
  10. 174
  11. 156
  12. 110
  13. 205
  14. 230
  15. 229
  16. 228
  17. 216
  18. 118
  19. 164
  20. 147
  21. 166
  22. 116
  23. 182
  24. 145
  25. 164
  26. 271
  27. 202
  28. 162
  29. 187
  30. 169
  31. 141
  32. 165
  33. 200
  34. 259
  35. 230
  36. 217
  37. 171
  38. 268
  39. 153
  40. 175

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